###--------------------------------------------------------------------------
### Packet classification.
-## IPv4 addressing.
-##
-## There are two small blocks of publicly routable IPv4 addresses, and a
-## block of RFC1918 private-use addresses allocated from the Cambridge G-RIN.
-## The former are as follows.
-##
-## 62.49.204.144/28
-## House border network (dmz). We have all of these, but .145
-## is reserved for the router.
-##
-## 212.13.18.64/28
-## Jump colocated network (jump). .65--68 are used by Jump
-## network infrastructure; we get the rest.
-##
-## The latter is the block 172.29.196.0/22. Currently the low half is
-## unallocated (and may be returned to the G-RIN); the remaining addresses
-## are allocated as follows.
-##
-## 172.29.198.0/24 Untrusted networks.
-## .0/25 house wireless net
-## .128/28 iodine (IP-over-DNS) network
-##
-## 172.29.199.0/24 Trusted networks.
-## .0/25 house wired network
-## .128/27 mobile VPN hosts
-## .160/28 reserved, except .160/30 allocated for ITS
-## .176/28 internal colocated network
-## .192/27 house safe network
-## .224/27 anycast services
-
-## IPv6 addressing.
-##
-## There are five blocks of publicly routable IPv6 addresses, though some of
-## them aren't very interesting. The ranges are as follows.
-##
-## 2001:470:1f08:1b98::/64
-## Hurricane Electric tunnel network: only :1 (HE) and :2
-## (radius) are used.
-##
-## 2001:470:1f09:1b98::/64
-## House border network (dmz).
-##
-## 2001:470:9740::/48
-## Main house range. See below for allocation policy.
-##
-## 2001:ba8:0:1d9::/64
-## Jump border network (jump): :1 is the router (supplied by
-## Jump); other addresses are ours.
-##
-## 2001:ba8:1d9::/48
-## Main colocated range. See below for allocation policy.
-##
-## Addresses in the /64 networks are simply allocated in ascending order.
-## The /48s are split into /64s by appending a 16-bit network number. The
-## top nibble of the network number classifies the network, as follows.
-##
-## 8xxx Untrusted
-## 6xxx Virtual, safe
-## 4xxx Safe
-## 0xxx Unsafe, trusted
-##
-## These have been chosen so that network properties can be deduced by
-## inspecting bits of the network number:
-##
-## Bit 15 If set, the network is untrusted; otherwise it is trusted.
-## Bit 14 If set, the network is safe; otherwise it is unsafe.
-##
-## Finally, the low-order nibbles identify the site.
-##
-## 0 No specific site: mobile VPN endpoints or anycast addresses.
-## 1 House.
-## 2 Jump colocation.
-##
-## Usually site-0 networks are allocated from the Jump range to improve
-## expected performance from/to external sites which don't engage in our
-## dynamic routing protocols.
-
## Define the available network classes.
m4_divert(42)m4_dnl
-defnetclass untrusted untrusted trusted mcast
-defnetclass trusted untrusted trusted safe noloop mcast
-defnetclass safe trusted safe noloop mcast
-defnetclass noloop trusted safe mcast
+defnetclass untrusted untrusted mcast
defnetclass link
defnetclass mcast
###--------------------------------------------------------------------------
### Network layout.
-## House networks.
-defnet dmz trusted
- addr 62.49.204.144/28 2001:470:1f09:1b98::/64
- via unsafe untrusted
-defnet unsafe trusted
- addr 172.29.199.0/25 2001:470:9740:1::/64
- via househub
-defnet safe safe
- addr 172.29.199.192/27 2001:470:9740:4001::/64
- via househub
-defnet untrusted untrusted
- addr 172.29.198.0/25 2001:470:9740:8001::/64
- via househub
-
-defnet househub virtual
- via housebdry dmz unsafe safe untrusted
-defnet housebdry virtual
- via househub hub
-
-## House hosts.
-defhost radius
- hosttype router
- iface eth0 dmz unsafe safe untrusted vpn sgo colobdry default
- iface eth1 dmz unsafe safe untrusted vpn sgo colobdry default
- iface eth2 dmz unsafe safe untrusted vpn sgo colobdry
- iface eth3 unsafe untrusted vpn default
- iface ppp0 default
- iface t6-he default
- iface vpn-precision colobdry vpn sgo
- iface vpn-chiark sgo
- iface vpn-+ vpn
-defhost roadstar
- iface eth0 dmz unsafe
- iface eth1 dmz unsafe
-defhost jem
- iface eth0 dmz unsafe
- iface eth1 dmz unsafe
-defhost artist
- hosttype router
- iface eth0 dmz unsafe untrusted
- iface eth1 dmz unsafe untrusted
- iface eth3 unsafe untrusted
-defhost vampire
- hosttype router
- iface eth0.4 dmz unsafe untrusted safe vpn sgo colobdry
- iface eth0.5 dmz unsafe untrusted safe vpn sgo colobdry
- iface eth0.6 dmz unsafe safe untrusted vpn sgo colobdry
- iface eth0.7 unsafe untrusted vpn
- iface vpn-precision colobdry vpn sgo
- iface vpn-chiark sgo
- iface vpn-+ vpn
-defhost ibanez
- iface br-dmz dmz unsafe
- iface br-unsafe unsafe
-defhost orange
- iface wlan0 untrusted
- iface vpn-radius unsafe
-defhost groove
- iface eth0 unsafe
- iface wlan0 untrusted
- iface vpn-radius unsafe
-
-defhost gibson
- hosttype client
- iface eth0 unsafe
-
-## Colocated networks.
-defnet jump trusted
- addr 212.13.198.64/28 2001:ba8:0:1d9::/64
- via colohub
-defnet colo trusted
- addr 172.29.199.176/28 2001:ba8:1d9:2::/64
- via colohub
-defnet colohub virtual
- via colobdry jump colo
-defnet colobdry virtual
- via colohub hub
-defnet iodine untrusted
- addr 172.29.198.128/28
- via colohub
-
-## Colocated hosts.
-defhost fender
- iface br-jump jump colo
- iface br-colo jump colo
-defhost precision
- hosttype router
- iface eth0 jump colo vpn sgo
- iface eth1 jump colo vpn sgo
- iface vpn-mango binswood
- iface vpn-radius housebdry vpn sgo
- iface vpn-chiark sgo
- iface vpn-+ vpn
-defhost telecaster
- iface eth0 jump colo
- iface eth1 jump colo
-defhost stratocaster
- iface eth0 jump colo
- iface eth1 jump colo
-defhost jaguar
- iface eth0 jump
-defhost jazz
- hosttype router
- iface eth0 jump colo vpn
- iface eth1 jump colo vpn
- iface dns0 iodine
- iface vpn-+ vpn
-
-## Other networks.
-defnet hub virtual
- via housebdry colobdry
-defnet sgo noloop
- addr !172.29.198.0/23
- addr 10.0.0.0/8
- addr 172.16.0.0/12
- addr 192.168.0.0/16
- via househub colohub
-defnet vpn safe
- addr 172.29.199.128/27 2001:ba8:1d9:6000::/64
- via househub colohub
- host crybaby 1 ::1:1
- host terror 2 ::2:1
- host orange 3 ::3:1
- host haze 4 ::4:1
- host groove 5 ::5:1
-defnet anycast trusted
- addr 172.29.199.224/27 2001:ba8:1d9:0::/64
- via dmz unsafe safe untrusted jump colo vpn
defnet default untrusted
- addr 62.49.204.144/28 2001:470:1f09:1b98::/64
- addr 212.13.198.64/28 2001:ba8:0:1d9::/64
- addr 2001:ba8:1d9::/48 #temporary
- via dmz unsafe untrusted jump colo
-
-## Satellite networks.
-defnet binswood noloop
- addr 10.165.27.0/24
- via colohub
-defhost mango
- hosttype router
- iface eth0 binswood default
- iface vpn-precision colo
+## Hosts.
+defhost jaguar
+ iface eth0 default
m4_divert(80)m4_dnl
###--------------------------------------------------------------------------
run ip46tables -A inbound -j forbidden
run ip46tables -A INPUT -m mark --mark $from_untrusted/$MASK_FROM -g inbound
+## Allow responses from the scary outside world into the untrusted net, but
+## don't let untrusted things run services.
+case $forward in
+ 1)
+ run ip46tables -A FORWARD -j ACCEPT \
+ -m mark --mark $to_untrusted/$(( $MASK_FROM | $MASK_TO )) \
+ -m state --state ESTABLISHED,RELATED
+ ;;
+esac
+
## Otherwise process as indicated by the mark.
for i in $inchains; do
run ip46tables -A $i -m mark ! --mark 0/$MASK_MASK -j ACCEPT
~mdw / firewall / blobdiff